3M TR-630 PAPR replacement parts

thingiverse

A local hospital was experiencing issues with the battery clips of their 3M TR-630 PAPR units breaking. Both the button and casing/clip that keeps it in were shattering, but the clip seemed to be the bigger problem, so I fixed that first. I went through a few iterations until I found one that fits snuggly and has been field-tested at the hospital for a few days now with no problems. My print had a little elephant footprint at the bottom, so a quick brush with a razor on the bottom outer edges took off enough to make it fit easily into the battery pack. Button clip: I originally designed the part to have the exact specs of the original, but found the original to be too weak in some areas. After removing the weak spots and resizing a bit to account for shrinkage, this one fits really well. Results may vary depending on your printer/cooling setup. 0.4mm layers made for a quick print, but made the clip hook a little too rounded. 0.2mm worked well enough and gets the print done in 25 minutes. 0.1mm would be great, but with a virus going around, nobody's got time for that. Print with supports. *Note*: I have a few new versions of this being field-tested right now. I'll update the model once I get more feedback. Button: Print with supports. If you need more springs, these on Amazon are a bit softer but fit and generally work. Belt clip: This design assumes that the belt clip sheared clean off and left part of the original clip in the machine. Rather than trying to remove the internals of the old clip, let's just plug right into it (ideally with a dab of glue). I made it curved like the original part, but it didn't add anything and it was nice to be able to print it face down / peg up without supports, so I made it face-side flat and positioned that facing down. No supports necessary. Hose Adapter: This is still a work in progress. Going to do some test prints soon, but you'll want to really bump up your infills on this considering it's actually helping to move air. Luckily that air will be positively pressured and most of the surface area will be embedded in either a tube or a hood, but plastic is cheap and COVID-19 sucks. Reach out and/or leave a comment if you need a hand. Designed in Tinkercad, so please don't judge my CAD skills too harshly.